21445534350054 has 96 divisors (see below), whose sum is σ = 49320768841344. Its totient is φ = 6980299260480.

The previous prime is 21445534350043. The next prime is 21445534350083. The reversal of 21445534350054 is 45005343554412.

21445534350054 is a `hidden beast` number, since 2 + 1 + 4 + 4 + 5 + 53 + 43 + 500 + 54 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 21445534349991 and 21445534350009.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 74943709 + ... + 75229319.

It is an arithmetic number, because the mean of its divisors is an integer number (513758008764).

Almost surely, 2^{21445534350054} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21445534350054, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24660384420672).

21445534350054 is an abundant number, since it is smaller than the sum of its proper divisors (27875234491290).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21445534350054 is a wasteful number, since it uses less digits than its factorization.

21445534350054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289264 (or 289252 counting only the distinct ones).

The product of its (nonzero) digits is 2880000, while the sum is 45.

The spelling of 21445534350054 in words is "twenty-one trillion, four hundred forty-five billion, five hundred thirty-four million, three hundred fifty thousand, fifty-four".